1. State Key Laboratory of Multimodal Artificial Intelligence Systems, Institute of Automation, Chinese Academy of Sciences, Beijing, China
2. School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, China
3. Department of Automation Science and Electrical Engineering, Beihang University, Beijing, China
4. Department of Advanced Manufacturing and Robotics, College of Engineering, and the Institute for Artificial Intelligence, Peking University, Beijing, China